CN102594133A - Boosting method and boosting circuit - Google Patents
Boosting method and boosting circuit Download PDFInfo
- Publication number
- CN102594133A CN102594133A CN2012100195636A CN201210019563A CN102594133A CN 102594133 A CN102594133 A CN 102594133A CN 2012100195636 A CN2012100195636 A CN 2012100195636A CN 201210019563 A CN201210019563 A CN 201210019563A CN 102594133 A CN102594133 A CN 102594133A
- Authority
- CN
- China
- Prior art keywords
- switch
- electric capacity
- voltage
- phase place
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention provides a boosting method and a boosting circuit. The boosting method comprises the steps as follows: in a first phase of a boosting cycle, charging a first flying capacitor and a second flying capacitor in a boosting circuit by the input end of the boosting circuit through input voltage; in a second phase of the boosting cycle, providing output voltage for the output end of the boosting circuit by the input end through discharging of the first flying capacitor; in a third phase of the boosting cycle, charging the first flying capacitor by the input end through the input voltage, and providing the output voltage for the output end through discharging of the second flying capacitor; and in a fourth phase of the boosting cycle, providing the output voltage for the output end by the input end through discharging of the first flying capacitor, wherein in the boosting cycle, the first to the fourth phases appear in sequence and last for the same time. According to the invention, the problem of larger voltage output ripple caused by different charging cycles and discharging cycles of the flying capacitors is solved, and the circuit performance of the boosting circuit is improved.
Description
Technical field
The present invention relates to electronic applications, in particular to a kind of step-up method and circuit.
Background technology
As a kind of power supply change-over device, charge pump circuit needing to be widely used in the place of voltage conversion.At present, common charge pump has 2 times of charge pumps that boost and 1.5 times of charge pumps that boost etc.Along with the extensive use of charge pump, to the efficient of charge pump require increasingly highly, 1.33 times of boosting charge pumps also occur thereupon.In order when realizing 1.33x boosting charge pump doubly, to keep high operating efficiency, mainly there are following several kinds of problems in booster circuit of the prior art:
1) generally need fly electric capacity (Flying Capacitor) and the switch more than ten is realized booster circuit, yet the quantity of electric capacity and switch is direct increase production cost too much with three outsides.
2) in the booster circuit of prior art, the general using three phase place methods of boosting realize 1.33 times boosting, and sort circuit has only time of 2/3 to output electric current to be provided in one-period, makes that the efficient of booster circuit is lower.
3) for 1.33 times above-mentioned booster circuit; According to first flying the situation of change sketch map that electric capacity (C1) and second flies electric capacity (C2) voltage in the booster circuit of three phase places as shown in Figure 1; Can find out: booster circuit flies electric capacity (C1) to first and charges in first phase place; When the charging of first phase place finished, the voltage Vc1 at C1 two ends was 1/3 of an input voltage vin, and the voltage Vc2 at C2 two ends is 2/3 of an input voltage vin; In second phase place, C1 is discharged, when second phase place finished, the voltage at C1 two ends was 0, and the voltage Vc2 at C2 two ends is 2/3 of an input voltage vin; In first phase place of third phase position and next cycle,, that is to say that continuous two phase places are charged to C1 to the C1 charging; And only with a phase time C1 is discharged; Make that charging amplitude and the discharge amplitude on second phase place of C1 on first phase place and third phase position is inconsistent, that is, charge rate and the discharge rate of C1 are inconsistent; Thereby cause output voltage ripple bigger, reduced the circuit performance of booster circuit.
To above-mentioned problem, effective solution is not proposed as yet at present.
Summary of the invention
The invention provides a kind of step-up method and circuit, to solve at least in the prior art owing to charge cycle and the inconsistent bigger problem of voltage output ripple that causes of discharge cycle to flying electric capacity.
According to an aspect of the present invention, a kind of step-up method is provided, this method comprises: in first phase place in the cycle of boosting, the input of booster circuit flies electric capacity and second through input voltage to first in the booster circuit and flies the electric capacity charging; In second phase place in the cycle of boosting, input flies capacitance discharges through first and to the output of booster circuit output voltage is provided; In the third phase position in the cycle of boosting, input flies electric capacity charging through input voltage to first, and flies capacitance discharges through second and to output output voltage is provided; In the 4th phase place in the cycle of boosting, input flies capacitance discharges through first and to output output voltage is provided; Wherein, in the cycle of boosting, first phase place, second phase place, third phase position and the 4th phase place occur in order and continue the identical time.
Preferably; The input of booster circuit flies the step that electric capacity and second flies electric capacity charging through input voltage to first in the booster circuit and comprises: input flies electric capacity and second through input voltage to first and flies electric capacity and charge in first phase place; Wherein, first fly electric capacity and second and fly capacitances in series and be connected between input and the ground end, when first phase place finishes; First fly the electric capacity two ends pressure drop be that the pressure drop that 1/3, the second of input voltage flies the electric capacity two ends is 2/3 of an input voltage.
Preferably; Input flies capacitance discharges through first provides the step of output voltage to comprise to the output of booster circuit: input flies capacitance discharges through first and to output output voltage is provided in second phase place; Wherein, When second phase place finishes, first fly the electric capacity two ends pressure drop be that output voltage deducts input voltage, second fly the electric capacity two ends pressure drop be 2/3 of input voltage.
Preferably; Input flies electric capacity charging through input voltage to first, and flies capacitance discharges through second and provide the step of output voltage to comprise to output: input flies electric capacity through input voltage to first and charges in the third phase position, and flies capacitance discharges through second and to output output voltage is provided; Wherein, When finish the third phase position, first fly the electric capacity two ends pressure drop be that the pressure drop that 1/3, the second of input voltage flies the electric capacity two ends is that output voltage deducts 2/3 input voltage.
Preferably; Input flies capacitance discharges through first provides the step of output voltage to comprise to output: input flies capacitance discharges through first and to output output voltage is provided in the 4th phase place; Wherein, When the 4th phase place finishes, first fly the electric capacity two ends pressure drop be that output voltage deducts input voltage, second fly the electric capacity two ends pressure drop be that output voltage deducts 2/3 input voltage.
According to an aspect of the present invention, a kind of booster circuit is provided, has comprised: first flies electric capacity, first fly electric capacity positive pole link to each other with voltage input end through first switch, first fly electric capacity positive pole pass through the 5th switch and link to each other with voltage output end; First fly electric capacity negative pole link to each other with voltage input end through the 4th switch, first fly electric capacity negative pole pass through the 6th switch and link to each other with the ground end with the 3rd switch; Second flies electric capacity; Second fly electric capacity positive pole close through minion and link to each other with voltage output end; Second fly electric capacity positive pole link to each other through the negative pole that second switch and first flies electric capacity; Second fly electric capacity positive pole link to each other with voltage input end with the 4th switch through second switch, second fly electric capacity positive pole link to each other with the negative pole that the 6th switch and second flies electric capacity through second switch, second fly electric capacity negative pole link to each other through the negative pole that the 6th switch and first flies electric capacity; Second fly electric capacity negative pole link to each other with voltage input end with the 4th switch through the 6th switch, second fly electric capacity negative pole pass through the 3rd switch and link to each other with the ground end.
Preferably; First switch, second switch and the 3rd switch are closure state on first phase place in cycle; The 4th switch, the 5th switch, the 6th switch and minion are closed and on first phase place, are opening; Wherein, voltage input end, first switch, first fly electric capacity, second switch, second flies electric capacity, the 3rd switch and ground end and on first phase place, constitutes the first phase place charging circuit.
Preferably; The 4th switch and the 5th switch are closure state on second phase place in cycle; First switch, second switch, the 3rd switch, the 6th switch and minion are closed and on second phase place, are opening; Wherein, voltage input end, the 4th switch, first fly electric capacity, the 5th switch and voltage output end and on second phase place, constitute the second phase place discharge circuit.
Preferably; First switch, the 6th switch and minion are closed and on the third phase position in cycle, are closure state; Second switch, the 3rd switch, the 4th switch and the 5th switch are opening on the third phase position; Wherein, voltage input end, first switch, first fly electric capacity, the 6th switch, second flies electric capacity, minion pass and voltage output end and on the third phase position, constitutes third phase position charge-discharge circuit.
Preferably; The 4th switch and the 5th switch are closure state on the 4th phase place in cycle; First switch, second switch, the 3rd switch, the 6th switch and minion are closed and on the 4th phase place, are opening; Wherein, voltage input end, the 4th switch, first fly electric capacity, the 5th switch and voltage output end and on the 4th phase place, constitute the 4th phase place discharge circuit.
In the present invention; Booster circuit through four phases boosts; All flying electric capacity to first in second phase place and the 4th phase place discharges; Thereby solved in the prior art owing to charge cycle and the inconsistent bigger problem of voltage output ripple that causes of discharge cycle, improved the circuit performance of booster circuit flying electric capacity.Further, fly electric capacity and seven switches have formed booster circuit through two, can carry out the control of different switch/closure through splitting to close, the booster circuit of formation out of phase simultaneously.The invention solves correlation technique can't utilize less electric capacity to realize the problem of boosting under the prerequisite that guarantees the booster performance; Under the situation of utilizing less electric capacity and switch; Realize dynamical booster circuit, guaranteed the performance of booster circuit, reduced production cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the voltage sketch map that flies electric capacity two ends pressure drop in 3 phase places of 3 phase place booster circuits in the correlation technique;
Fig. 2 is a kind of preferred circuit sketch map according to embodiment of the invention booster circuit;
Fig. 3 is the on off state sketch map according to first phase place of embodiment of the invention booster circuit;
Fig. 4 is a kind of voltage sketch map that flies electric capacity two ends pressure drop in 4 phase places according to 4 phase place booster circuits of the embodiment of the invention;
Fig. 5 is the on off state sketch map according to second phase place of embodiment of the invention booster circuit;
Fig. 6 is the on off state sketch map according to the third phase position of embodiment of the invention booster circuit;
Fig. 7 is the on off state sketch map according to the 4th phase place of embodiment of the invention booster circuit;
Fig. 8 is a kind of preferred flow charts according to embodiment of the invention step-up method;
Fig. 9 is the another kind of voltage sketch map that flies electric capacity two ends pressure drop in 4 phase places according to 4 phase place booster circuits of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
As shown in Figure 2; The invention provides a kind of preferred booster circuit; This booster circuit comprises: first flies electric capacity (C1); First fly electric capacity (C1) positive pole link to each other with voltage input end (Vin) through first switch (S1), first fly electric capacity (C1) positive pole pass through the 5th switch (S5) and link to each other with voltage output end (Vout); First fly electric capacity (C1) negative pole link to each other with voltage input end (Vin) through the 4th switch (S4), first fly electric capacity (C1) negative pole pass through the 6th switch (S6) and link to each other with the ground end with the 3rd switch (S3); Second flies electric capacity (C2); Second fly electric capacity (C2) positive pole close (S7) through minion and link to each other with voltage output end (Vout); Second fly electric capacity (C2) positive pole link to each other through the negative pole that second switch (S2) and first flies electric capacity (C1); Second fly electric capacity (C2) positive pole link to each other with voltage input end (Vin) with, the 4th switch (S4) through second switch (S2); Second fly electric capacity (C2) positive pole link to each other with the negative pole that the 6th switch (S6) and second flies electric capacity (C2) through second switch (S2); Second fly electric capacity (C2) negative pole through linking to each other with negative pole that the 6th switch (S6) and first flies electric capacity (C1), second fly electric capacity (C2) negative pole link to each other with voltage input end (Vin) with the 4th switch (S4) through the 6th switch (S6), second fly electric capacity (C2) negative pole also pass through the 3rd switch (S3) and link to each other with the ground end.
Preferably, a parallelly connected filter capacitor (Cout) between voltage output end (Vout) and the ground end.
In above-mentioned preferred implementation, fly electric capacity and seven switches have formed booster circuit through two, can carry out the control of different switch/closure through splitting to close, the booster circuit of formation out of phase simultaneously.Present embodiment has solved correlation technique can't be under the prerequisite that guarantees the booster performance; Utilize less electric capacity to realize the problem of boosting, reached under the situation of utilizing less electric capacity and switch, realize booster circuit; Guarantee the performance of booster circuit, reduced production cost.
In the booster circuit shown in the foregoing description; Through on the out of phase of one-period, controlling the unlatching of each switch or closing; Make on out of phase to constitute different charge-discharge circuits with various combination in the switch, thereby obtain the operating voltage that needs with storage and transfer that different conditions carries out energy by the above-mentioned electric capacity that flies.According to booster circuit shown in Figure 2; Preferably; Can be after the operating voltage of the perfectly straight stream of Vin termination, the different On/Off combination according to switch S 1-S7 forms 4 phase places that time span is identical in one-period; Repeat the cycle that these 4 phase places are formed, thereby guarantee the direct voltage that can obtain continuing at Vout.
Below will combine accompanying drawing to describe 4 circuit connection structures under the out of phase.
1) first phase place (Phase_1): as shown in Figure 3; S1, S2 and S3 the cycle (for example; Boost the cycle) first phase place on be closure state; S4, S5, S6 and S7 are opening on first phase place, wherein, Vin, S1, C1, S2, C2, S3 and ground end constitute the first phase place charging circuit on first phase place.Preferably, hereinafter is represented the voltage at C1 two ends with Vc1, representes the voltage at C2 two ends with Vc2.As shown in Figure 4, charge on first phase place, for C1 and C2, wherein preferred, the pressure drop Vc1 at C1 two ends is since 0 charging, and the pressure drop Vc2 at C2 two ends begins charging from 1/3Vin.When charging finished, the pressure drop at C1 two ends was 1/3Vin, and the pressure drop at C2 two ends is 2/3Vin.
The first phase place charging circuit to shown in Figure 3 can obtain following relational expression according to Kirchhoff's law:
Vin＝Vc1+Vc2。(formula 1)
2) second phase place (Phase_2): as shown in Figure 5; S4 and S5 are closure state on second phase place in cycle; S1, S2, S3, S6 and S7 are opening on second phase place, wherein, Vin, S4, C1, S5 and Vout constitute the second phase place discharge circuit on second phase place.As shown in Figure 4, on second phase place, voltage is provided for voltage output end (Vout) through C1 and Vin; When discharge finished, the pressure drop Vc1 at C1 two ends was 0, in whole second phase place; The ceiling voltage of output is 4/3Vin, and the pressure drop Vc2 at C2 two ends keeps 2/3Vin.
The second phase place discharge circuit to shown in Figure 5 can obtain following relational expression according to Kirchhoff's law:
Vout＝Vin+Vc1。(formula 2)
3) third phase position (Phase_3): as shown in Figure 6; S1, S6 and S7 are closure state on the third phase position in cycle; S2, S3, S4 and S5 are opening on the third phase position, wherein, Vin, S1, C1, S6, C2, S7 and Vout constitute third phase position charge-discharge circuit on the third phase position.As shown in Figure 4, on the third phase position, C1 is charged through Vin, wherein, C1 charges since 0; In addition, on the third phase position, voltage is provided for voltage output end (Vout) through the discharge of C2, discharges and recharges in the third phase position when finishing, the pressure drop Vc1 at C1 two ends is 1/3Vin, and the pressure drop Vc2 at C2 two ends is 1/3Vin.
Third phase position charge-discharge circuit to shown in Figure 6 can obtain following relational expression according to Kirchhoff's law:
Vout＝Vin-Vc1+Vc2。(formula 3)
4) the 4th phase place (Phase_4): as shown in Figure 7; S4 and S5 are closure state on the 4th phase place in cycle; S1, S2, S3, S6 and S7 are opening on the 4th phase place, wherein, Vin, S4, C1, S5 and Vout constitute the 4th phase place discharge circuit on the 4th phase place.As shown in Figure 4, the 4th phase place is voltage to be provided for voltage output end (Vout) through the discharge of C1, and when the discharge of the 4th phase place finished, the pressure drop Vc1 at C1 two ends was 0, and the pressure drop Vc2 at C2 two ends is 1/3Vin.
The 4th phase place charge-discharge circuit to shown in Figure 7 can obtain following relational expression according to Kirchhoff's law:
Vout＝Vin+Vc1。(formula 4)
In above-mentioned Fig. 3-four phase places shown in Figure 7,, can release according to formula 2 and formula 3:
2Vc1＝Vc2。(formula 5)
Again formula 5 is distinguished substitution formula 1 and formula 4, thereby releases:
Vc1＝1/3Vin。(formula 6)
Vout＝4Vc1。(formula 7)
With formula 6 substitution formula 7, finally obtain: Vout=1.33Vin again.
In above-mentioned preferred implementation, utilize two to fly electric capacity and four charge/discharge technology mutually, reached from the high-performance conversion of 1.33 times of voltages that input to output.All C1 is discharged in second phase place and the 4th phase place, thereby avoided in correlation technique C1 to be switched, improved the efficient of booster circuit by the poor efficiency phase place of double charging ( phase place 1 and 3).Simultaneously, in the present invention, at all outside output voltage of second phase place, third phase position and the 4th phase place; That is to say 3/4 outside output voltage of cycle, thereby improved the performance (2/3 outside output voltage of cycle in the prior art) of the integral body of whole booster circuit, further; Fig. 4 compares and can find with Fig. 1, in the present invention for the change in voltage situation at the booster circuit of the present invention's 4 phase places C1 and C2 two ends in four phase places; All C1 is discharged in second phase place and the 4th phase place, thereby make two phase place chargings two phase place discharges; The amplitude that discharges and recharges that has guaranteed C1 is consistent; Make that the ripple of final output voltage is less, chip receives the influence of parasitic parameter of circuit board also less, has improved the circuit performance of whole booster circuit.
Preferably, the change procedure that flies electric capacity two ends pressure drop in 4 phase places as shown in Figure 4 is a kind of example, and the present invention is not limited only to this; Starting voltage when flying capacitor C 1 with the C2 charging and ceiling voltage can be for removing other values shown in the foregoing description, and be for example, as shown in Figure 9; Starting voltage when flying capacitor C 1 charging can be V3; Ceiling voltage during charging can be V1, and the starting voltage when flying capacitor C 2 chargings can be V4, and the ceiling voltage during charging can be V2.
When first phase place finishes, V1+V2=Vin (formula 8), wherein, on first phase place, the amplitude of variation of Vc1 and Vc2 is identical, that is, and V1-V3=V2-V4 (formula 9) (in the present embodiment, suppose to fly capacitor C 1 identical) with the capacitance that flies capacitor C 2.
When second phase place finishes, V3=Vout-Vin (formula 10);
When finishing in the third phase position, Vin-V1+V4=Vout (formula 11).
Four equations through shown in the formula 8-11 can solve:
V1＝1/3Vin；
V2＝2/3Vin；
V3＝Vout-Vin；
V4＝Vout-2/3Vin；
V1-V3＝V2-V4＝4/3Vin-Vout。
That is to say, when first phase place finishes, first fly the electric capacity two ends pressure drop Vc1 be that the pressure drop Vc2 that 1/3, the second of input voltage vin flies the electric capacity two ends is 2/3 of an input voltage vin;
When second phase place finishes, first fly the electric capacity two ends pressure drop Vc1 deduct input voltage vin for output voltage V out, second fly the electric capacity two ends pressure drop Vc2 be 2/3 of input voltage vin;
When finish the third phase position, first fly the electric capacity two ends pressure drop Vc1 be that the pressure drop Vc2 that 1/3, the second of input voltage vin flies the electric capacity two ends deducts 2/3 input voltage vin for output voltage V out;
When the 4th phase place finishes, first fly the electric capacity two ends pressure drop Vc1 deduct input voltage vin for output voltage V out, second fly the electric capacity two ends pressure drop Vc2 deduct 2/3 input voltage vin for output voltage V out.
For example, if Vout=Vin, V3=0 then, V4=1/3Vin, V1-V3=V2-V4=1/3Vin.
In a preferred embodiment of the invention, booster circuit can also comprise: the switch control assembly is used for the state of each switch in the loop of boosting is controlled to form 1.33 times boost.
Preferably, switch control assembly: be used for first phase place in the cycle of boosting, produce first control signal, control S1, S2 and S3 are closure state, and rest switch is an off-state; On second phase place in the cycle of boosting, produce second control signal, control S4 and S5 are closure state, rest switch is an off-state; On the third phase position in the cycle of boosting, produce the 3rd control signal, control S1, S6 and S7 are closure state, rest switch is an off-state; On the 4th phase place in the cycle of boosting, produce the 4th control signal, control S4 and S5 are closure state, rest switch is an off-state.
In a preferred embodiment of the invention; In order to be implemented in the one-period; The time that four kinds of phase places can occur in order and each phase place keeps is identical; A sequential generation unit can be set; This sequential generation unit is controlled the switch control assembly respectively through 4 road connecting lines of 4 road clock signals that the transmitting continuous time is identical respectively, phase place is different and is produced first control signal, second control signal, the 3rd control signal and the 4th control signal, thereby controls the time that each phase place continues, and the time span in the cycle of boosting.
In a preferred embodiment of the invention, at least one among the switch S 1-S7 can be the MOS switching tube.In above-mentioned preferred implementation,, thereby guaranteed the stability of circuit because the MOS switching tube can satisfy the requirement of higher operational frequency.
In a preferred embodiment of the invention, C1 has the structure identical with C2, and preferred, C1 has identical capacitance with C2.
Based on above-mentioned preferred booster circuit, the present invention also provides a kind of preferred step-up method, and is as shown in Figure 8, and this method comprises:
S802: in first phase place in the cycle of boosting, the input of booster circuit flies electric capacity and second through input voltage to first in the booster circuit and flies the electric capacity charging;
S804: in second phase place in the cycle of boosting, input flies capacitance discharges through first and to the output of booster circuit output voltage is provided;
S806: in the third phase position in the cycle of boosting, input flies electric capacity charging through input voltage to first, and flies capacitance discharges through second and to output output voltage is provided;
S808: in the 4th phase place in the cycle of boosting, input flies capacitance discharges through first and to output output voltage is provided; Wherein, in the cycle of boosting, first phase place, second phase place, third phase position and the 4th phase place occur in order and continue the identical time.
In above-mentioned preferred implementation; Booster circuit through four phases boosts; All flying electric capacity to first in second phase place and the 4th phase place discharges; Thereby solved in the prior art owing to charge cycle and the inconsistent bigger problem of voltage output ripple that causes of discharge cycle, improved the circuit performance of booster circuit flying electric capacity.
Preferably; Can be through on the out of phase of one-period, controlling the unlatching of each switch or closing; Make on out of phase to constitute different charge-discharge circuits with various combination in the switch, thereby obtain the operating voltage that needs with storage and transfer that different conditions carries out energy by the above-mentioned electric capacity that flies.In one-period, form 4 phase places that time span is identical, repeat the cycle that these 4 phase places are formed, thereby guarantee the direct voltage that can obtain continuing at Vout.
In a preferred embodiment of the invention; The input of booster circuit flies the step that electric capacity and second flies electric capacity charging through input voltage to first in the booster circuit and can comprise: input flies electric capacity and second through input voltage to first and flies electric capacity and charge in first phase place; Wherein, First flies electric capacity and second flies capacitances in series and is connected between input and the ground end (particularly; The annexation that flies electric capacity and input, output and ground end can be with reference to circuit shown in Figure 3), when first phase place finishes, first fly the electric capacity two ends pressure drop be 1/3 of input voltage; Second fly the electric capacity two ends pressure drop be 2/3 (particularly, flying the variation relation of pressure drop Vc1 and the Vc2 at capacitor C 1 and C2 two ends can be with reference to sketch map shown in Figure 9) of input voltage.
In a preferred embodiment of the invention; Input flies capacitance discharges through first provides the step of output voltage to comprise to the output of booster circuit: input flies capacitance discharges through first in second phase place provide output voltage (particularly to output; The annexation that flies electric capacity and input, output and ground end can be with reference to circuit shown in Figure 5); Wherein, When second phase place finishes; Said first fly the electric capacity two ends pressure drop be that said output voltage deducts said input voltage, said second fly the electric capacity two ends pressure drop be 2/3 (particularly, flying the variation relation of pressure drop Vc1 and the Vc2 at capacitor C 1 and C2 two ends can be with reference to sketch map shown in Figure 9) of said input voltage.
In a preferred embodiment of the invention; Input flies the electric capacity charging through input voltage to first; And fly capacitance discharges through second and provide the step of output voltage to comprise to output: input flies electric capacity through input voltage to first and charges in the third phase position; And fly capacitance discharges through second and to output output voltage (particularly, the annexation that flies electric capacity and input, output and ground end can be with reference to circuit shown in Figure 6) is provided, wherein; When finish the third phase position; First fly the electric capacity two ends pressure drop be that pressure drop that 1/3, the second of input voltage flies the electric capacity two ends is that output voltage deducts 2/3 input voltage (particularly, flying the variation relation of pressure drop Vc1 and the Vc2 at capacitor C 1 and C2 two ends can be with reference to sketch map shown in Figure 9).
In a preferred embodiment of the invention; Input flies capacitance discharges through first provides the step of output voltage to comprise to output: input flies capacitance discharges through first in the 4th phase place provide output voltage (particularly to output; The annexation that flies electric capacity and input, output and ground end can be with reference to circuit shown in Figure 7); Wherein, when the 4th phase place finishes, first fly the electric capacity two ends pressure drop be that output voltage deducts input voltage; Second fly the electric capacity two ends pressure drop be that output voltage deducts 2/3 input voltage (particularly, flying the variation relation of pressure drop Vc1 and the Vc2 at capacitor C 1 and C2 two ends can be with reference to sketch map shown in Figure 9).
In the above-described embodiments, all C1 is discharged, C1 is charged in first phase place and the third phase position in the cycle of boosting in second phase place and the 4th phase place in the cycle of boosting; Thereby make two phase place chargings; Two phase place discharges have guaranteed that the amplitude that discharges and recharges of C1 is consistent, make that the ripple of final output voltage is less; Chip receives the influence of parasitic parameter of circuit board also less, has improved the circuit performance of whole booster circuit.
As a kind of preferred embodiment, the variation relation of above-mentioned pressure drop Vc1 that flies capacitor C 1 and C2 two ends and Vc2 also can be with reference to sketch map shown in Figure 4, and specifically change procedure can repeat no more at this with reference to the description among the embodiment 1.
In a preferred embodiment of the invention; In order to be implemented in the one-period; The time that four kinds of phase places can occur in order and each phase place keeps is identical; A sequential generation unit can be set; This sequential generation unit is controlled the switch control assembly respectively through 4 road connecting lines of 4 road clock signals that the transmitting continuous time is identical respectively, phase place is different and is produced first control signal, second control signal, the 3rd control signal and the 4th control signal, thereby controls the time that each phase place continues, and the time span in the cycle of boosting.
From above description, can find out that the present invention has realized following technique effect:
1) proposes a kind of new four methods of boosting mutually, can when adopting two outsides to fly electric capacity, effectively improve the electric charge pump performance.
2) electric capacity that adopts and the quantity of switch are fewer, have reduced production cost.
3) there is the time in 3/4 cycle that voltage is being provided, improved the overall performance of whole booster circuit.
4) in one-period, the amplitude of variation that discharge and recharge of voltage on 4 phase places of one-period that flies the electric capacity two ends equate, thereby make output ripple less, and it is also less that chip is influenced by the parasitic parameter of circuit board.
More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a step-up method is characterized in that, comprising:
In first phase place in the cycle of boosting, the input of booster circuit flies electric capacity and second through input voltage to first in the said booster circuit and flies the electric capacity charging;
In second phase place in the said cycle of boosting, said input flies capacitance discharges through said first and to the output of said booster circuit output voltage is provided;
In the third phase position in the said cycle of boosting, said input flies electric capacity charging through said input voltage to said first, and flies capacitance discharges through second and to said output output voltage is provided;
In the 4th phase place in the said cycle of boosting, said input flies capacitance discharges through said first and to said output output voltage is provided;
Wherein, in the said cycle of boosting, said first phase place, said second phase place, said third phase position and said the 4th phase place occur in order and continue the identical time.
2. method according to claim 1 is characterized in that, the input of said booster circuit flies the step that electric capacity and second flies electric capacity charging through input voltage to first in the said booster circuit and comprises:
Said input flies electric capacity and said second through input voltage to said first and flies electric capacity and charge in said first phase place; Wherein, Said first flies electric capacity and said second flies capacitances in series and is connected between said input and said the end; When said first phase place finishes, said first fly the electric capacity two ends pressure drop be 1/3 of said input voltage, said second fly the electric capacity two ends pressure drop be 2/3 of said input voltage.
3. method according to claim 1 is characterized in that, said input flies capacitance discharges through said first provides the step of output voltage to comprise to the output of said booster circuit:
Said input flies capacitance discharges through said first and to said output said output voltage is provided in said second phase place; Wherein, When said second phase place finishes; Said first fly the electric capacity two ends pressure drop be that said output voltage deducts said input voltage, said second fly the electric capacity two ends pressure drop be 2/3 of said input voltage.
4. method according to claim 1 is characterized in that, said input flies electric capacity charging through said input voltage to said first, and flies capacitance discharges through second and provide the step of output voltage to comprise to said output:
Said input flies electric capacity through said input voltage to said first and charges in said third phase position; And fly capacitance discharges through said second and output voltage is provided to said output; Wherein, When finish said third phase position, said first fly the electric capacity two ends pressure drop be 1/3 of said input voltage, said second fly the electric capacity two ends pressure drop be that said output voltage deducts 2/3 said input voltage.
5. method according to claim 1 is characterized in that, said input flies capacitance discharges through said first provides the step of output voltage to comprise to said output:
Said input flies capacitance discharges through said first and to said output said output voltage is provided in said the 4th phase place; Wherein, When said the 4th phase place finishes; Said first fly the electric capacity two ends pressure drop be that said output voltage deducts said input voltage, said second fly the electric capacity two ends pressure drop be that said output voltage deducts 2/3 said input voltage.
6. a booster circuit is characterized in that, comprising:
First flies electric capacity, said first fly electric capacity positive pole link to each other with voltage input end through first switch, said first fly electric capacity positive pole pass through the 5th switch and link to each other with voltage output end; Said first fly electric capacity negative pole link to each other with said voltage input end through the 4th switch, said first fly electric capacity negative pole pass through the 6th switch and link to each other with the ground end with the 3rd switch;
Second flies electric capacity; Said second fly electric capacity positive pole close through minion and link to each other with said voltage output end; Said second fly electric capacity positive pole link to each other through the negative pole that second switch and said first flies electric capacity; Said second fly electric capacity positive pole link to each other with said voltage input end with said the 4th switch through said second switch; Said second fly electric capacity positive pole link to each other with the negative pole that said the 6th switch and said second flies electric capacity through said second switch; Said second fly electric capacity negative pole link to each other through the negative pole that said the 6th switch and said first flies electric capacity, said second fly electric capacity negative pole link to each other with said voltage input end with said the 4th switch through said the 6th switch, said second fly electric capacity negative pole link to each other with holding saidly through said the 3rd switch.
7. booster circuit according to claim 6; It is characterized in that; Said first switch, said second switch and said the 3rd switch are closure state on first phase place in cycle; Said the 4th switch, said the 5th switch, said the 6th switch and said minion are closed and on said first phase place, are opening; Wherein, said voltage input end, said first switch, said first fly that electric capacity, said second switch, said second fly electric capacity, said the 3rd switch and said the end constitutes the first phase place charging circuit on said first phase place.
8. booster circuit according to claim 7; It is characterized in that; Said the 4th switch and said the 5th switch are closure state on second phase place in said cycle; Said first switch, said second switch, said the 3rd switch, said the 6th switch and said minion are closed and on said second phase place, are opening; Wherein, said voltage input end, said the 4th switch, said first fly electric capacity, said the 5th switch and said voltage output end and on said second phase place, constitute the second phase place discharge circuit.
9. booster circuit according to claim 8; It is characterized in that; Said first switch, said the 6th switch and said minion are closed and on the third phase position in said cycle, are closure state; Said second switch, said the 3rd switch, said the 4th switch and said the 5th switch are opening on said third phase position; Wherein, said voltage input end, said first switch, said first fly electric capacity, said the 6th switch, said second flies electric capacity, said minion pass and said voltage output end and on said third phase position, constitutes third phase position charge-discharge circuit.
10. according to each described booster circuit in the claim 7 to 9; It is characterized in that; Said the 4th switch and said the 5th switch are closure state on the 4th phase place in said cycle; Said first switch, said second switch, said the 3rd switch, said the 6th switch and said minion are closed and on said the 4th phase place, are opening; Wherein, said voltage input end, said the 4th switch, said first fly electric capacity, said the 5th switch and said voltage output end and on said the 4th phase place, constitute the 4th phase place discharge circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210019563.6A CN102594133B (en) | 2012-01-20 | 2012-01-20 | Boosting method and boosting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210019563.6A CN102594133B (en) | 2012-01-20 | 2012-01-20 | Boosting method and boosting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102594133A true CN102594133A (en) | 2012-07-18 |
| CN102594133B CN102594133B (en) | 2014-10-22 |
Family
ID=46482430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210019563.6A Active CN102594133B (en) | 2012-01-20 | 2012-01-20 | Boosting method and boosting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102594133B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293882A (en) * | 2019-01-28 | 2020-06-16 | 展讯通信（上海）有限公司 | Step-up/step-down circuit and control method |
| CN112994449A (en) * | 2021-02-26 | 2021-06-18 | 珠海澳大科技研究院 | Three-state resonant switch capacitor power converter and control method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293883B (en) | 2019-01-28 | 2021-07-13 | 展讯通信（上海）有限公司 | Step-up/step-down circuit and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6563235B1 (en) * | 2000-10-03 | 2003-05-13 | National Semiconductor Corporation | Switched capacitor array circuit for use in DC-DC converter and method |
| US20070096795A1 (en) * | 2005-11-01 | 2007-05-03 | Catalyst Semiconductor, Inc. | LED bias current control using adaptive fractional charge pump |
| US20070152737A1 (en) * | 2006-01-02 | 2007-07-05 | Shui-Mu Lin | Low noise multiphase charge pump and control method thereof |
| US20070194363A1 (en) * | 2005-11-01 | 2007-08-23 | Catalyst Semiconductor, Inc. | Fractional Charge Pump For Step-Down DC-DC Converter |
| CN101083431A (en) * | 2006-05-29 | 2007-12-05 | 松下电器产业株式会社 | Charge pump circuit |
| CN102082507A (en) * | 2010-12-29 | 2011-06-01 | 厦门联创微电子股份有限公司 | Capacitor charge pump |
-
2012
- 2012-01-20 CN CN201210019563.6A patent/CN102594133B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6563235B1 (en) * | 2000-10-03 | 2003-05-13 | National Semiconductor Corporation | Switched capacitor array circuit for use in DC-DC converter and method |
| US20070096795A1 (en) * | 2005-11-01 | 2007-05-03 | Catalyst Semiconductor, Inc. | LED bias current control using adaptive fractional charge pump |
| US20070194363A1 (en) * | 2005-11-01 | 2007-08-23 | Catalyst Semiconductor, Inc. | Fractional Charge Pump For Step-Down DC-DC Converter |
| US20070152737A1 (en) * | 2006-01-02 | 2007-07-05 | Shui-Mu Lin | Low noise multiphase charge pump and control method thereof |
| CN101083431A (en) * | 2006-05-29 | 2007-12-05 | 松下电器产业株式会社 | Charge pump circuit |
| CN102082507A (en) * | 2010-12-29 | 2011-06-01 | 厦门联创微电子股份有限公司 | Capacitor charge pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293882A (en) * | 2019-01-28 | 2020-06-16 | 展讯通信（上海）有限公司 | Step-up/step-down circuit and control method |
| WO2020155288A1 (en) * | 2019-01-28 | 2020-08-06 | 展讯通信（上海）有限公司 | Buck-boost circuit and control method |
| CN111293882B (en) * | 2019-01-28 | 2021-07-23 | 展讯通信（上海）有限公司 | Step-up/step-down circuit and control method |
| US11799376B2 (en) | 2019-01-28 | 2023-10-24 | Spreadtrum Communications (Shanghai) Co., Ltd. | Buck-boost circuit and control method |
| CN112994449A (en) * | 2021-02-26 | 2021-06-18 | 珠海澳大科技研究院 | Three-state resonant switch capacitor power converter and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102594133B (en) | 2014-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208063044U (en) | Switch tank circuit converter | |
| WO2016011380A1 (en) | System and method for two-phase interleaved dc-dc converters | |
| CN103650313B (en) | DC-DC converter with modular grade | |
| CN102761254B (en) | Switching power unit | |
| CN110036559A (en) | High power charge pump with inductance element | |
| US9768682B2 (en) | Switched capacitors with inverted break-before-make without external filtering load capacitor | |
| Schaef et al. | 20.2 A variable-conversion-ratio 3-phase resonant switched capacitor converter with 85% efficiency at 0.91 W/mm 2 using 1.1 nH PCB-trace inductors | |
| US8432712B2 (en) | Single switch high efficiency power supply | |
| CN108092513A (en) | DC-to-DC converter | |
| CN102290992B (en) | DC-DC boost converter circuit and method for driving the same | |
| CN102771039A (en) | Dc/dc power conversion device | |
| CN102082507B (en) | Capacitor charge pump | |
| JP2022525491A (en) | DC-DC converter | |
| CN102594133B (en) | Boosting method and boosting circuit | |
| Abe et al. | A Fibonacci-type dc-ac inverter designed by switched capacitor technique | |
| CN116365875A (en) | Multilevel inverting buck-boost converter architecture | |
| CN103607115A (en) | Charge pump device | |
| CN203537232U (en) | Charge pump device | |
| CN102751859A (en) | Soft start circuit and start control method thereof | |
| CN102231597B (en) | Charge pump and working method thereof | |
| CN201904721U (en) | Voltage-boosting charge pump | |
| CN202435267U (en) | Boosting circuit | |
| CN216981786U (en) | Boost circuit and boost system | |
| Jasmine et al. | A high gain boost converter with input current ripple reduction | |
| CN207234670U (en) | A kind of charge pump circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100048, B-1608, century economic and trade building, 72 West Third Ring Road North, Beijing, Haidian District Applicant after: Sgmicro electronic (Beijing) Limited by Share Ltd Address before: 100048, B-1608, century economic and trade building, 72 West Third Ring Road North, Beijing, Haidian District Applicant before: Sgmicro (Beijing) Co., Ltd. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |